What are child safety seat /restraint laws?

Chapter 90, sec 7AA and 13A of the motor vehicle laws control this important area of safety. Basically, when riding in motor vehicles, infants and small children must ride in a federally approved child passenger restraint until: they are at least five (5) years old and they weigh over 40 pounds. Children under 5 and over 40 pounds must ride in a booster seat. Children 5 or older and more that 40 pounds must use a seatbelt, but a booster seat is recommended.